21223533532212 has 108 divisors (see below), whose sum is σ = 58978550292480. Its totient is φ = 6430318746720.

The previous prime is 21223533532193. The next prime is 21223533532249.

21223533532212 is a `hidden beast` number, since 2 + 1 + 223 + 53 + 353 + 22 + 12 = 666.

21223533532212 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21223533532212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26362339 + ... + 27155477.

Almost surely, 2^{21223533532212} is an apocalyptic number.

21223533532212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21223533532212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29489275146240).

21223533532212 is an abundant number, since it is smaller than the sum of its proper divisors (37755016760268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21223533532212 is a wasteful number, since it uses less digits than its factorization.

21223533532212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799314 (or 799298 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

It can be divided in two parts, 2122353 and 3532212, that added together give a palindrome (5654565).

The spelling of 21223533532212 in words is "twenty-one trillion, two hundred twenty-three billion, five hundred thirty-three million, five hundred thirty-two thousand, two hundred twelve".